Enlisted at the age of 28
6th ReinforcementsTrained
Narrow Neck, AucklandTransfer to England
HMNZT 90 UlimaroaMarched in to NZ Depot, Christchurch
Embarked for France
Marched in to NZ Base Depot, Etaples
Joined the Company
The Company was still carrying out the digging of underground premises and defences on the Front near Arras
German Attacks
Spring Offensive
The Company was engaged in the defence of Arras by digging new trenches and dug-outs under constant enemy shellfire
Allied Attacks
Hundred Days OffensiveAdmitted to hospital with scalp injury
Rejoined the Company
The Company experienced its newly reconversion in bridge construction
Granted leave to the United Kingdom
Cessation of Hostilities
Armistice
The Company continued to build bridges to reconnect a fragmented territory
Rejoined the Company
Promoted Corporal
Discharged
Embarked for England
Marched in to NZ Depot, Larkhill
Marched in to NZ Depot, Codford
Reverted to Sapper and forfeited 11 days pay for releasing two prisoners without proper authorisation
Transfer to New Zealand
Troopship RimutakaEnd of Service
DemobilizationAnthony Byledbal, “World War I Timeline of William John O'Callaghan“, New Zealand Tunnellers Website, NaN (2009), Accessed: . URL: www.
